Leaves

Question 1

Large, flat and green structures involved in photosynthesis

Answer 1

Leaves

Question 2

Leaves functions for what? Give two

Answer 2

Photosynthesis and transpiration (exit of water from plant as water vapor)

Question 3

What are the natures of blade? Describe them

Answer 3

1. Simple - with one blade of just one part

2. Compound - with a blade divided into leaflets or pinnae or pinnule

Question 4

Two types of simple pinante

Answer 4

odd and even pinnate (terminal leaflet / at the tip)

Question 5

Type of pinnately compound leaf which consists of 2 rachis, where leaves are attached to the secondary rachis

Answer 5

Bipinnate

Question 6

Type of pinnately compound leaf where the leaves are attached to the tertiary rachis

Answer 6

Tripinnate

Question 7

Type of leaf where leaflets are attached to the rachis

Answer 7

Pinnately compound

Question 8

Type of leaf where leaflets are attached at the end of the petiole

Answer 8

Palmately compound

Question 9

Types of palmately compound leaves

Answer 9

1. Bifoliate
2. Trifoliate
3. Quadra / Tetrafoliate
4. Pentafoliate

Question 10

It is the arrangement of leaves on the stem

Answer 10

Phyllotaxy

Question 11

Phyllotaxy: one leaf per node

Answer 11

Alternate

Question 12

Phyllotaxy: two leaves on a node attached oppositely

Answer 12

Opposite

Question 13

Phyllotaxy: each pair of leaves is perpendicular with one another

Answer 13

Decussate

Question 14

Phyllotaxy: three or more attached to the node wherein the leaves are equidistant

Answer 14

Whorled

Question 15

It is the arrangement of veins on the blade of a leaf

Answer 15

Venation

Question 16

3 types of netted venation

Answer 16

1. Pinnately netted - lateral veins arise from the midrib
2. Palmately netted - veins arise from one point of the base of the leaf
3. Radiately netted - principal veins radiate at the tip of the petiole (center)

Question 17

4 types of parallel venation

Answer 17

1. Parallel to midrib
2. Perpendicular to midrib
3. Acute angle to midrib
4. Palmately parallel

Question 18

It is a layer of living cells. Trichomes, guard cells, bulliform cells and a cutin layer is present.

Answer 18

Epidermis

Question 19

Mesophyll is composed of ___?

Answer 19

Parenchyma cells (chlorenchyma and aerenchyma)

Question 20

Internal structure of a dicot leaf: It is the photosynthetic region of the leaf

Answer 20

Mesophyll

Question 21

Dorsiventral or bifacial

Answer 21

Horizontal

Question 22

Isobilateral or equifacial

Answer 22

Vertical

Question 23

What is the function of bulliform cells?

Answer 23

Prevents water loss

Question 24

Internal structure of a midrib: the upper part is the ___ and the lower part is the ____ for a crescent shaped leaf

Answer 24

Upper = xylem, lower = phloem

Question 25

Arrange the internal structure of a midrib

Answer 25

Epidermis > collenchyma > parenchyma > xylem > phloem

Question 26

Internal structure of a gymnosperm leaf: True or false: the pine needle leaf is evergreen and xeromorphic

Answer 26

True

Question 27

What does xeromorphic mean?

Answer 27

Can withstand hot environment

Question 28

The purpose of having a sunken stomata is to ___?

Answer 28

Prevent water loss

Question 29

Leaf aging due to the breakdown of chlorophyll, sugars, and loss of photosynthetic ability

Answer 29

Senescence

Question 30

Detachment area of leaves from the stem

Answer 30

Abscission zone

Question 31

Special leaves: Thick and fleshy, reduced surface-volume ration for water retention

Answer 31

Succulent leaves

Question 32

Special leaves: For protection

Answer 32

Sclerophyllous foliage

Question 33

Special leaves: No blade and needle-shaped

Answer 33

Spines

Question 34

Special leaves: Sensing contact with other objects, no lamina for support

Answer 34

Tendrils

Question 35

Special leaves: For support and protection

Answer 35

Motile leaves

Question 36

Special leaves: Digest insects and absorb nitrogen for their amino acid

Answer 36

Insect traps

Question 37

Special leaves: Product plantlets for asexual reproduction

Answer 37

Adventitious buds

Question 38

Modified leaves: Aerenchymatous leaf base for buoyancy and support in water hyacinth

Answer 38

Float

Question 39

Modified leaves: colored leaves are what for?

Answer 39

Attraction

Question 40

Modified leaves: For support

Answer 40

Supporting leaf bases - pseudotrunk

Question 41

Modified leaves:

Answer 41

Expanded leaf-like petiole and stipule for photosynthesis

Question 42

Light harvesting portion of the leaf

Answer 42

Leaf blade / Lamina

Question 43

Stalk the holds the blade out into the light

Answer 43

Petiole

Question 44

A leaf with a petiole

Answer 44

Petiolate

Question 45

A leaf without petiole

Answer 45

Sessile

Question 46

Extension of petiole

Answer 46

Rachis

Question 47

Stalk that holds the leaflet

Answer 47

Petiolule

Question 48

Formed when the base of the leaf is wrapped around the base

Answer 48

Leaf sheath

Question 49

Tip of the leaf blade

Answer 49

Apex

Question 50

Midvein, from which the lateral veins emerge

Answer 50

Midrib

Question 51

Bundle of vascular tissue

Answer 51

Vein

Question 52

A pair of appendages or outgrowth at the base

Answer 52

Stipule